Troubleshooting On Initial Installation; Table 14: Troubleshooting - DWT WaCS PWM Serie Instrucciones De Instalación Y Mantenimiento

5.2 Troubleshooting on initial installation

Fault
The display shows
Pump current (RC) not set
EC
1) No water.
2) Pump not primed.
3) Flow sensor disconnected.
4) Entry of setpoint too high for pump.
5) Inverted direction of rotation.
The display shows
6) Incorrect setting of pump current
BL
7) Maximum frequency too low (*).
8) SO parameter not set
9) MP minimum pressure parameter
The display shows
BPx
1) Excessive absorption.
The display shows
2) Pump blocked.
3) Pump absorbs high current on start-
OF
1) Incorrect pump current setting (RC).
The display shows 2) Excessive absorption.
3) Pump blocked.
OC
4) Inverted direction of rotation.
The display shows
1) Low power supply voltage
2) Excessive voltage drop on line
LP
Regulation
FL setting too high
pressure greater
than SP
The display shows
Short circuit between phases
SC
1) Minimum flow threshold FT setting
The pump never
2) Short observation time(*).
stops
3) Unstable pressure regulation(*).
4) Incompatible use (*).
1)Short observation time(*).
The pump stops
2) Minimum frequency FL setting too
even when not
3) Excessively high setting of minimum
required
The multi inverter
system does not
start
The display shows:
Press + to align this
config
In a multiple
inverter system the
parametres are not
propagatable
(*) The asterisk refers to cases of systems without the flow sensor
Possible causes
RC(*).
correctly
not set correctly
1) Pressure sensor disconnected.
2) Pressure sensor faulty.
up.
too low.
high (*).
shutdown frequency FZ (*).
One or more inverters have an
incorrect RC current setting.
One or more inverters have sensitive
parameters not aligned
1) Different passwords
2) Presence of non-propagatable
configurations

Table 14: Troubleshooting

ENGLISH
Set parameter RC (see section 6.5.1).
1-2) Prime the pump ad ensure that there is no air in the pipelines. Check
that intake or any filters are not obstructed Check that the pipeline from the
pump to the inverter is not damaged or leaking.
3) Check the connections to the flow sensor.
4) Lower the setpoint or use a pump suited to system requirements.
5) Check the direction of rotation (see 6.5.2).
6) Set a correct value for pump current RC(*) (see 6.5.1).
7) If possible, increase FS or lower RC(*) (see 6.6.6).
8) set SO value correctly (see para. 6.5.14)
9) set MP value correctly (see para. 6.5.15
1) Check the pressure sensor cable connection.
BP1 refers to the sensor connected to Press 1, BP2 to press2,
BP3 to current sensor connected to J5
2) Replace the pressure sensor.
1) Check type of connection; star or delta. Check that the motor does not
absorb current over the max. admissible value for inverter. Check that the
motor has all phases connected.
2) Check that the impeller or motor is not blocked or obstructed by foreign
bodies. Check motor phase connections
3) Reduce the acceleration parameter AC (see 6.6.11).
1) Set RC with the current according to the type of connection (star or delta)
as stated on the motor dataplate (see 6.5.1)
2) Check that the motor has all phases connected.
3) Check that the impeller or motor is not blocked or obstructed by foreign
bodies.
4) Check the direction of rotation (see 6.5.2).
1) Ensure presence of correct line voltage.
2) Check the power cable section
(see section 2.2.1).
Reduce minimum operating frequency FL (if electric pump enables this)
Ensure that the motor is in the correct condition and check connections to
the latter
1) Set a higher FT threshold
2) Set a higher FZ threshold
3) Wait for the self-learning process (*) or run quick learning mode (see
para 6.5.9.1.1)
3) Correct GI and GP(*) (see 6.6.4 and 6.6.5)
4) Ensure that the system meets the operating requirements without the
flow sensor (*) (see section 6.5.9.1). Attempt to reset by pressing MODE
SET + - to recalculate conditions without the flow sensor.
1) Wait for the self-learning process (*) or run quick learning mode (see
para 6.5.9.1.1).
2) If possible set a lower FL value(*).
3) Enter a lower threshold for FZ.
Check the RC current setting on each inverter.
Press + on the inverter that has the most recent and correct configuration of
parameters.
1) access each inverter individually and enter the same password on all, or
remove the password. See para. 6.6.16
2) modify the configuration so that it is propagatable; it is not admitted to
propagate configurations with FI=0 or FZ=0. See paragraph 4.2.2.2
104
Remedy